require('locus');

var myVar = 123;
var myObj = {
  key: 'value'
};

function makeSomething() {
  var some = 'some value';

  // will start a repl session
  // you can manipulate the program at runtime
  eval(locus);

  // another option
  eval(require('locus'))

  return some;
}

makeSomething();